radius 400 m and length 200 m on this highway. Compute the set – back distance required from the center line on the inner side of the curve so as to provide for: a. SSD of 90 m; b. Safe SSD of 300 m 2. An abandoned pile of containers are located 7.5 m from the edge of the outer lane of a two-lane highway, which has 3.4 – m lanes. The obstruction is situated on the inside of a 12° horizontal curve. Use metric arc basis. a. Calculate the minimum sight distance along the curve. b. Calculate the design speed for this curve c. If the design speed calculated from part b is increased by 20 kph, calculate the distance required for the movement of the obstruction.
1. There is a horizontal highway curve of radius 400 m and length 200 m on this highway. Compute the
set – back distance required from the center line on the inner side of the curve so as to provide for:
a. SSD of 90 m;
b. Safe SSD of 300 m
2. An abandoned pile of containers are located 7.5 m from the edge of the outer lane of a two-lane
highway, which has 3.4 – m lanes. The obstruction is situated on the inside of a 12° horizontal curve.
Use metric arc basis.
a. Calculate the minimum sight distance along the curve.
b. Calculate the design speed for this curve
c. If the design speed calculated from part b is increased by 20 kph, calculate the distance required
for the movement of the obstruction.
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